Discrete element study of liquid-solid slurry flows through constricted channels
Discrete element model is used to simulate the flow of liquid-granule mixtures in an inclined channel containing a linear contraction. All the relevant particle/particle and particle/fluid interactions are included in the numerical model. The presence of the contraction induces different steady morphologies of the solid phase or the mixture depending on whether closed or open channels are used. These flows behave quite differently depending on the upstream Froude number and the contraction size ratio. The model is first validated by comparing with the existing results for dry granular (glass particles) chute flows (Vreman et al., 2007). Then simulations of a chute of glass particles in water flowing in a closed channel are compared to the dry granular case. With the same solid flux at the inlet, the hydrodynamic forces in the liquid-solid mixture induce higher particle solid volume fractions in the part of the flow containing the solid phase. The streamwise particle velocity (resp. depth of the solid phase) has the same evolution along the channel with smaller (larger) values than in the dry granular flow case.
Fluid-particle flow Discrete Particle Model chute flows
Micheline Abbas Martin Van der Hoef Onno Bokhove Hans Kuipers
Dept.of Fundamentals of Chemical Reaction Engineering, Twente University M.E Dept.of Fundamentals of Chemical Reaction Engineering, Twente University m.a Dept.of Applied Mathematics, Twente University Dept.of Fundamentals of Chemical Reaction Engineering, Twente Universityj.a.m
国际会议
西安
英文
329-334
2009-07-11（万方平台首次上网日期，不代表论文的发表时间）